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Finding the Fourth Proportional to 72,369.05, 108,584.55 and 30,258.97

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Solution

The fourth proportional to 72,369.05, 108,584.55 and 30,258.97 is: 45,401.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,369.05 : 108,584.55 = 30,258.97 : x
  2. Step 2: Convert to fraction form
    72,369.05/108,584.55 = 30,258.97/x
  3. Step 3: Cross multiply
    72,369.05x = 108,584.55 × 30,258.97
  4. Step 4: Simplify right side
    72,369.05x = 3,285,656,369.45
  5. Step 5: Solve for x
    x = 3,285,656,369.45/72,369.05
  6. Step 6: Final answer
    x = 45,401.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.